Antiproton magnetic moment determined from the HFS of antiprotonic helium

Abstract

We report a determination of the antiproton magnetic moment, measured in a three-body system, independent of previous experiments. We present results from a systematic study of the hyperfine (HF) structure of antiprotonic helium where we have achieved a precision more than a factor of 10 better than our first measurement. A comparison between the experimental results and three-body quantum electrodynamic (QED) calculations leads to a new value for the antiproton magnetic moment is -2.7862 (83) nuclear magnetons, which agrees with the magnetic moment of the proton within 2.9 x 10e-3.

References in corpus (3)

• Hyperfine structure of antiprotonic helium revealed by a laser-microwave-laser resonance method
• Improved Study of the Antiprotonic Helium Hyperfine Structure
• Preliminary Results from Recent Measurements of the Antiprotonic Helium Hyperfine Structure

Cited by in corpus (16)

• BASE - The Baryon Antibaryon Symmetry Experiment
• Physics at CERN's Antiproton Decelerator
• Resolution of Single Spin-Flips of a Single Proton
• Direct Measurement of the Proton Magnetic Moment
• Constraints on exotic spin-dependent interactions between matter and antimatter from antiprotonic helium spectroscopy
• Spin-dependent exotic interactions
• Calculation of transition probabilities and ac Stark shifts in two-photon laser transitions of antiprotonic helium
• Demonstration of the Double Penning Trap Technique with a Single Proton
• Pseudovector and pseudoscalar spin-dependent interactions in atoms
• Precision measurements of the fundamental properties of the proton and antiproton
• First observation of two hyperfine transitions in antiprotonic He-3
• Microwave spectroscopic study of the hyperfine structure of antiprotonic helium-3
• Spin-orbit corrections of order $m{\alpha }^6$ to the fine structure of $(37,35)$ state in ${}^4{He}^{+}\bar{p}$ atom
• Shift and broadening of resonance lines of the antiprotonic helium atoms in liquid He-4
• Testing Lorentz symmetry with atoms and Light
• Collision Induced Relaxations within the Antiprotonic Helium Hyperfine Structure